SWS GRAFEX HF FREQUENCY PREDICTIONS ADDRESS NO. 1234 =============================================================================== Circuit: Kununurra Perth Date: 1 May, 2025 T-index: 115 Bearings: 214 39 Distance: 2219 km First Mode |--------F r e q u e n c y (MHz)---------| Second Mode 1F 7-10 1E 0 1 5 10 15 20 25 30 35 40 2F 21-26 2E 6 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT 00 25.2 0.0 10.2 SSSS MMMMMMMMFF FFFFF%%%.. .. 15.9 10.9 6.3 00 01 27.7 0.0 11.2 ASSS SXMMMMMMMF FFFFFFF%%% %.... 17.3 12.6 6.9 01 02 28.2 0.0 11.8 SSS SXXMMMMMMM FFFFFFFF%% %%.... 17.7 13.6 7.2 02 03 28.0 0.0 12.2 SSS SSXXMMMMMM FFFFFFF%%% %.... 17.7 14.1 7.4 03 04 27.5 0.0 12.2 SSS SSXXMMMMMF FFFFFFF%%% %.... 17.4 14.3 7.4 04 05 27.1 0.0 12.1 SSS SSXXMMMMMF FFFFFFF%%% .... 17.2 14.2 7.2 05 06 26.5 0.0 11.7 ASSS SXXMMMMMMF FFFFFF%%%% .... 16.9 13.6 7.0 06 07 26.8 0.0 10.9 ASSS XXMMMMMMMF FFFFFF%%%% ..... 16.9 12.7 6.5 07 08 26.4 0.0 9.6 ASSSX MMMMMMMMMF FFFFFF%%%% .... 16.6 10.8 5.8 08 09 25.0 0.0 6.9 SSMMMM MMMMMMMMFF FFFF%%%%.. ... 16.1 6.6 4.4 09 10 20.9 0.0 0.0 XXMMMMMMMM MMMMMMFFFF %%%%..... 13.8 2.1 0.0 10 11 16.8 0.0 0.0 XXMMMMMMMM MMMFFF%%%% ...... 11.3 2.1 0.0 11 12 14.6 0.0 0.0 XXMMMMMMMM MFFF%%%%.. .. 9.9 2.1 0.0 12 13 12.8 0.0 0.0 XXMMMMMMMM FF%%%..... 8.6 2.1 0.0 13 14 11.8 0.0 0.0 XXMMMMMMMF F%%%..... 7.9 2.1 0.0 14 15 10.7 0.0 0.0 XXMMMMMMMF %%%%..... 7.3 2.1 0.0 15 16 10.5 0.0 0.0 XXMMMMMMFF %%%..... 7.2 2.1 0.0 16 17 9.9 0.0 0.0 XXMMMMMMF% %%%.... 7.0 2.1 0.0 17 18 9.3 0.0 0.0 XXMMMMMMF% %%..... 6.6 2.1 0.0 18 19 8.4 0.0 0.0 XXMMMMMF%% %..... 5.7 2.1 0.0 19 20 7.7 0.0 0.0 XXMMMMM%%% ..... 5.4 2.1 0.0 20 21 7.4 0.0 0.0 XXMMMMM%%% .... 5.5 2.1 0.0 21 22 11.0 0.0 0.0 XXMMMMMMFF %%%%... 6.8 2.1 1.7 22 23 21.0 0.0 8.3 SSSMM MMMMFFFFFF %%%%... 12.5 7.6 5.4 23 UT OWF EMUF ALF |...|....| ....|....| ....|....| ....|....| OWF EMUF ALF UT =============================================================================== |. USABLE LESS THAN 50% OF DAYS |% USABLE 50% TO 90% OF DAYS | |B BOTH E and F MODES 90% OF DAYS |M MIXED FIRST AND SECOND F MODES | |F FIRST F MODE ONLY |E E-LAYER PROPAGATION |P 90% E and 50-90% F | |S SECOND MODES ONLY |A HIGH ABSORPTION |X COMPLEX MODES | (c) 1-May-2025 BoM Space Weather Services, Sydney Australia +61-2-9213-8000